Detect variable reuse with different type

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#111 6 comments 2 reactions 0 assignees View on GitHub

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Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
35/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Stale
Tech stack
php
Domain
devtools

Research direction

The issue provides PHP examples but names no files, tests, or entry points. Start by locating how PHPStan strict rules inspect variable types and how existing rules are tested; done means reliably warning when a variable is reassigned with a different type without warning on compatible reuse.

Written by the indexing model from the issue text.

Description

Feature request

I think this is okay.

$var = 'apple';
$var = 'nice ' . $var;

But many developers tend to stuff other type into the same variable.

$list = [1, 2, 3];
$list = \implode(', ', $list);

Could PHPStan warn me when a variable's type changes?

Dominant language
PHP
Stars
709
Forks
62
Avg merge
5d 19h
Merged PRs (30d)
3

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